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About SunsynkPopular Sunsynk Solar Batteries1. L Series 5.32kWh2. S Series Ecco 5.12kWh3. Radia 10.49kWhHow Does Sunsynk Compare to Other Home Battery Brands?Pros & Cons of Sunsynk Solar Battery StorageWhat Size Sunsynk Home Battery Do I Need?Are Solar Batteries Worth It in the UK?Sunsynk Solar Battery Storage FAQs
About SunsynkPopular Sunsynk Solar Batteries1. L Series 5.32kWh2. S Series Ecco 5.12kWh3. Radia 10.49kWhHow Does Sunsynk Compare to Other Home Battery Brands?Pros & Cons of Sunsynk Solar Battery StorageWhat Size Sunsynk Home Battery Do I Need?Are Solar Batteries Worth It in the UK?Sunsynk Solar Battery Storage FAQs
Sunsynk solar battery storage is becoming an increasingly popular choice for people looking to reduce energy bills and gain more control over their electricity use.
With rising energy costs a concern for many, systems like Sunsynk offer a way to store excess solar power and use it when you need it most.
In this review, we break down everything you need to know about Sunsynk solar battery storage in the UK, including key features, performance, costs and overall value. Ultimately, we hope this guide will help you decide if Sunsynk is the right fit for your home.
We will also compare Sunsynk to other popular battery storage options available in the UK so you understand the pros, cons, and whether it's a smart investment for your home.
Curious about costs? Enter your details for a free, solar battery storage quote below:
Sunsynk is a global renewable energy brand that specialises in solar inverters and battery storage systems, with a growing presence in the UK market. Known for its hybrid inverter technology, Sunsynk offers solutions that allow people to store excess solar energy, reduce reliance on the grid and improve overall energy efficiency.
One of Sunsynk’s key strengths is its all-in-one approach. Its systems are designed to integrate solar panels, battery storage and grid power into a single, intelligent setup. This makes it easier to manage energy usage, maximise self-consumption and maintain power during outages when paired with the right configuration.
In the UK, Sunsynk has gained popularity due to its competitive pricing and flexible system options. It supports a wide range of battery types and capacities, making it suitable for different household energy needs, from smaller homes to larger properties with higher demand.
The brand is also known for its user-friendly monitoring, allowing homeowners to track energy generation, storage and usage in real time through an app or online portal. This level of visibility helps users make smarter decisions about when and how they use electricity.
Overall, Sunsynk positions itself as a cost-effective and versatile solar battery storage solution, appealing to people who want greater energy independence without the premium price tag of some competing brands.
Sunsynk offers a range of solar battery storage options designed to suit different household energy needs and budgets in the UK. Whether you are looking for a compact system for basic energy storage or a larger setup to maximise solar usage, there are several configurations available.
Below, we take a closer look at some of the most popular Sunsynk batteries, highlighting their key features, capacities and what type of home they are best suited for:
| Specification | Sunsynk L Series 5.32kWh |
|---|---|
| Energy | 5.32 kWh |
| Usable Energy | 4.79 kWh |
| Recommended Depth of Discharge | 90% |
| Dimensions (W/H/D) | 440 × 620 × 135 mm |
| Weight | Approx. 46 kg |
| Cycle Life | ≥6000 (25±2ºC, 90% DOD, 0.5C/0.5C, 70% EOL) |
| Installation | Wall mounted (supports 19-inch standard cabinet) |
| Warranty | 10 years |
Key Features
Compact and space-saving design suitable for wall mounting
High cycle life for long-term reliability and durability
Flexible installation options including cabinet compatibility
Designed for integration with Sunsynk hybrid inverter systems
The Sunsynk L Series 5.32kWh battery is a practical option for smaller households or those just starting with solar battery storage. It is particularly well suited to homes with moderate evening energy usage, helping to store excess solar power for use after sunset without requiring a large upfront investment.
| Specification | Sunsynk S Series Ecco 5.12kWh |
|---|---|
| Usable Energy | 5.12 kWh |
| Dimensions (W/D/H) | 450 × 150 × 533 mm |
| Weight | 46 kg |
| Installation | Floor standing or wall mounted |
| Cycle Life | Min. 7,000 half cycles or 3,500 full cycles |
| Warranty | 5 years (at 80% DoD) |
| Scalability | Up to 15 batteries in parallel |
Key Features
Uses LiFePO₄ chemistry for improved safety and stability
High usable capacity with deep discharge capability
Scalable system design for expanding energy storage
Quick and straightforward installation process
The Sunsynk S Series Ecco 5.12kWh battery is well suited to households looking for a balance between performance and flexibility. It works particularly well for homes planning to scale their system over time, or those with higher daily energy usage who want a reliable storage solution that can grow with their needs.
| Specification | Sunsynk Radia 10.49kWh |
|---|---|
| Capacity | 10.49 kWh |
| Dimensions (W/D/H) | 530 × 245 × 675 mm |
| Weight | 86 kg |
| Installation | Floor standing or wall mounted |
| Cycle Life | 6000 cycles @ 80% DOD / 25°C / 0.5C, 60% EOL |
| Scalability | Up to 15 batteries in parallel |
| Application | On-grid, on-grid with backup, or off-grid |
Key Features
Large capacity suited for higher energy demands
Compatible with grid-tied, backup and fully off-grid systems
Scalable setup to support expanding energy needs
Durable design built for consistent long-term performance
The Sunsynk Radia 10.49kWh battery is ideal for larger households or properties with significant energy usage, such as homes with electric heating, EV charging or multiple occupants. It is particularly well suited to people who want greater energy independence or are considering a more advanced solar and battery setup.
Sunsynk is one of several solar battery storage brands available in the UK, each offering different strengths in terms of price, performance, scalability and smart features. Choosing the right system often comes down to your budget, energy usage and how advanced you want your setup to be.
Below is how Sunsynk compares to other popular home battery brands on the market:
EcoFlow: EcoFlow focuses on plug-and-play, modular systems that are easy to install and expand, making them more beginner-friendly; Sunsynk offers a more integrated solution with hybrid inverters and greater flexibility for full-home setups.
Growatt: Growatt is known for affordable solar and battery systems with solid performance; Sunsynk is similarly priced but often offers more flexibility in battery compatibility and system configuration.
Fox ESS: Fox ESS provides reliable, mid-range battery storage with clean design and good app monitoring; Sunsynk tends to offer more versatile inverter options and broader system compatibility.
Duracell Energy: Duracell Energy positions itself as a premium, trusted brand with strong warranties and customer appeal; Sunsynk is typically more cost-effective while still delivering comparable performance.
Sigenergy: Sigenergy is a newer, high-tech option with advanced smart features and sleek design; Sunsynk is less focused on cutting-edge aesthetics but offers proven reliability and better value for money.
Tesla: Tesla Powerwall is one of the most well-known premium battery systems with seamless app control and strong brand recognition; Sunsynk is more affordable and flexible, particularly for custom or expandable installations.
Sunsynk solar battery storage offers a strong balance between performance, flexibility and cost, making it a popular choice for homeowners in the UK. Like any system, it comes with both advantages and drawbacks depending on your energy needs, property type and budget.
Below is a clear breakdown of the key pros and cons to help you decide if Sunsynk is the right fit for your home:
Competitive solar battery pricing compared to many premium battery brands
Flexible system design with compatibility across different battery types and inverter setups
Scalable solutions that can grow with your energy needs over time
Hybrid inverter technology allows seamless integration with solar panels and grid supply
Suitable for on-grid, backup and off-grid applications
Good cycle life, supporting long-term usage and value
Helps reduce electricity bills by storing and using excess solar energy
Provides greater energy independence and protection against rising energy costs
Less brand recognition compared to market leaders like Tesla
App and monitoring interface may feel less polished than premium competitors
Some systems require more planning and setup compared to plug-and-play alternatives
Warranty terms can differ between products, requiring careful review before purchase
Choosing the right Sunsynk home battery size depends on your energy usage, solar panel output and what you want the system to achieve. In the UK, most households use between 8 to 12 kWh of electricity per day, but your actual usage may vary based on property size, number of occupants and appliances like electric heating or EV chargers.
As a general guide, a smaller battery around 5 kWh is suitable for homes with lower energy demand or those looking to cover evening usage after solar generation stops. This can help reduce reliance on the grid during peak times without a large upfront cost.
Medium-sized systems, typically around 10 kWh, are better suited to average households that want to maximise self-consumption of solar energy. These setups can store more excess power during the day and provide greater coverage overnight.
Larger or expandable systems are ideal for homes with higher energy usage or those aiming for greater energy independence. If you have electric heating, a hot tub or plan to charge an electric vehicle at home, a higher-capacity or scalable Sunsynk system will be more effective.
It is also worth considering future needs. Choosing a battery that can be expanded over time gives you flexibility as your energy usage changes, helping you get the most long-term value from your investment.
The best way to choose the right solar battery size for your home is to speak with a professional installer, such as Glow Green. We will assess your energy usage and recommend the most suitable battery system, along with providing a free, no-obligation quote tailored to your property.
Solar batteries are becoming increasingly popular in the UK, and for good reason. With energy prices remaining high and more households investing in solar panels, adding battery storage is one of the most effective ways to maximise your savings and energy independence.
In most cases, solar batteries are definitely worth it in the UK. Instead of exporting excess solar energy back to the grid for a relatively low return, a battery allows you to store that energy and use it later, especially during the evening when electricity costs are typically higher.
They can also help protect you against rising energy prices by reducing how much electricity you need to buy from your supplier. Over time, this can lead to noticeable savings on your energy bills, particularly if your system is sized correctly for your home.
Beyond cost savings, solar batteries give you more control over your energy usage. Some systems can even provide backup power during outages, adding an extra layer of reliability for your home.
If you already have solar panels or are planning to install solar, adding a battery is often a smart long-term investment. The combination allows you to make better use of the energy you generate and reduce your reliance on the grid.
For a more detailed breakdown of costs, savings and whether it is right for your situation, read our full guide: Are Solar Batteries Worth It in the UK?
Sunsynk batteries are designed to last for many years, with many offering around 6,000 charge cycles and warranties of up to 10 years depending on the model.
Yes, you can use a home battery without solar panels, including Sunsynk systems, by charging it from the grid during off-peak hours and using that stored energy later.
Yes, many Sunsynk systems can provide backup power during outages when installed with the correct inverter and configuration.
Savings vary depending on your energy usage and system size, but a solar battery can significantly reduce electricity bills by increasing self-consumption of solar energy.
Yes, solar batteries still work in winter, although solar generation is lower, so they may store less energy compared to summer months.
